If U.S. President Donald Trump fails in his stated goal of annexing Canada through economic force, what would happen if he ordered the world’s most powerful military to invade?

Some experts and academics say it’s a notion too preposterous to even contemplate. But Aisha Ahmad isn’t one of them.

“When you look at the power (imbalance) between the U.S. and Canada, an invasion would immediately result in the defeat of the Canadian Armed Forces,” said the University of Toronto political science professor, who last month published an essay on the subject in The Conversation.

“But a conventional military victory is not the end of this story. It’s just the beginning.”